diff options
Diffstat (limited to 'src/main/java/de/thedevstack/conversationsplus/crypto')
7 files changed, 0 insertions, 1178 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/OtrService.java b/src/main/java/de/thedevstack/conversationsplus/crypto/OtrService.java deleted file mode 100644 index c9ee53ae..00000000 --- a/src/main/java/de/thedevstack/conversationsplus/crypto/OtrService.java +++ /dev/null @@ -1,311 +0,0 @@ -package de.thedevstack.conversationsplus.crypto; - -import java.math.BigInteger; -import java.security.KeyFactory; -import java.security.KeyPair; -import java.security.KeyPairGenerator; -import java.security.NoSuchAlgorithmException; -import java.security.PrivateKey; -import java.security.PublicKey; -import java.security.spec.DSAPrivateKeySpec; -import java.security.spec.DSAPublicKeySpec; -import java.security.spec.InvalidKeySpecException; - -import org.json.JSONException; -import org.json.JSONObject; - -import android.util.Log; - -import de.thedevstack.conversationsplus.Config; -import de.thedevstack.conversationsplus.ConversationsPlusPreferences; -import de.thedevstack.conversationsplus.entities.Account; -import de.thedevstack.conversationsplus.entities.Conversation; -import de.thedevstack.conversationsplus.services.XmppConnectionService; -import de.thedevstack.conversationsplus.utils.CryptoHelper; -import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState; -import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException; -import de.thedevstack.conversationsplus.xmpp.jid.Jid; -import de.thedevstack.conversationsplus.xmpp.stanzas.MessagePacket; - -import net.java.otr4j.OtrEngineHost; -import net.java.otr4j.OtrException; -import net.java.otr4j.OtrPolicy; -import net.java.otr4j.OtrPolicyImpl; -import net.java.otr4j.crypto.OtrCryptoEngineImpl; -import net.java.otr4j.crypto.OtrCryptoException; -import net.java.otr4j.session.InstanceTag; -import net.java.otr4j.session.SessionID; -import net.java.otr4j.session.FragmenterInstructions; - -public class OtrService extends OtrCryptoEngineImpl implements OtrEngineHost { - - private Account account; - private OtrPolicy otrPolicy; - private KeyPair keyPair; - private XmppConnectionService mXmppConnectionService; - - public OtrService(XmppConnectionService service, Account account) { - this.account = account; - this.otrPolicy = new OtrPolicyImpl(); - this.otrPolicy.setAllowV1(false); - this.otrPolicy.setAllowV2(true); - this.otrPolicy.setAllowV3(true); - this.keyPair = loadKey(account.getKeys()); - this.mXmppConnectionService = service; - } - - private KeyPair loadKey(JSONObject keys) { - if (keys == null) { - return null; - } - try { - BigInteger x = new BigInteger(keys.getString("otr_x"), 16); - BigInteger y = new BigInteger(keys.getString("otr_y"), 16); - BigInteger p = new BigInteger(keys.getString("otr_p"), 16); - BigInteger q = new BigInteger(keys.getString("otr_q"), 16); - BigInteger g = new BigInteger(keys.getString("otr_g"), 16); - KeyFactory keyFactory = KeyFactory.getInstance("DSA"); - DSAPublicKeySpec pubKeySpec = new DSAPublicKeySpec(y, p, q, g); - DSAPrivateKeySpec privateKeySpec = new DSAPrivateKeySpec(x, p, q, g); - PublicKey publicKey = keyFactory.generatePublic(pubKeySpec); - PrivateKey privateKey = keyFactory.generatePrivate(privateKeySpec); - return new KeyPair(publicKey, privateKey); - } catch (JSONException e) { - return null; - } catch (NoSuchAlgorithmException e) { - return null; - } catch (InvalidKeySpecException e) { - return null; - } - } - - private void saveKey() { - PublicKey publicKey = keyPair.getPublic(); - PrivateKey privateKey = keyPair.getPrivate(); - KeyFactory keyFactory; - try { - keyFactory = KeyFactory.getInstance("DSA"); - DSAPrivateKeySpec privateKeySpec = keyFactory.getKeySpec( - privateKey, DSAPrivateKeySpec.class); - DSAPublicKeySpec publicKeySpec = keyFactory.getKeySpec(publicKey, - DSAPublicKeySpec.class); - this.account.setKey("otr_x", privateKeySpec.getX().toString(16)); - this.account.setKey("otr_g", privateKeySpec.getG().toString(16)); - this.account.setKey("otr_p", privateKeySpec.getP().toString(16)); - this.account.setKey("otr_q", privateKeySpec.getQ().toString(16)); - this.account.setKey("otr_y", publicKeySpec.getY().toString(16)); - } catch (final NoSuchAlgorithmException | InvalidKeySpecException e) { - e.printStackTrace(); - } - - } - - @Override - public void askForSecret(SessionID id, InstanceTag instanceTag, String question) { - try { - final Jid jid = Jid.fromSessionID(id); - Conversation conversation = this.mXmppConnectionService.find(this.account,jid); - if (conversation!=null) { - conversation.smp().hint = question; - conversation.smp().status = Conversation.Smp.STATUS_CONTACT_REQUESTED; - mXmppConnectionService.updateConversationUi(); - } - } catch (InvalidJidException e) { - Log.d(Config.LOGTAG,account.getJid().toBareJid()+": smp in invalid session "+id.toString()); - } - } - - @Override - public void finishedSessionMessage(SessionID arg0, String arg1) - throws OtrException { - - } - - @Override - public String getFallbackMessage(SessionID arg0) { - return "I would like to start a private (OTR encrypted) conversation but your client doesn’t seem to support that"; - } - - @Override - public byte[] getLocalFingerprintRaw(SessionID arg0) { - try { - return getFingerprintRaw(getPublicKey()); - } catch (OtrCryptoException e) { - return null; - } - } - - public PublicKey getPublicKey() { - if (this.keyPair == null) { - return null; - } - return this.keyPair.getPublic(); - } - - @Override - public KeyPair getLocalKeyPair(SessionID arg0) throws OtrException { - if (this.keyPair == null) { - KeyPairGenerator kg; - try { - kg = KeyPairGenerator.getInstance("DSA"); - this.keyPair = kg.genKeyPair(); - this.saveKey(); - mXmppConnectionService.databaseBackend.updateAccount(account); - } catch (NoSuchAlgorithmException e) { - Log.d(Config.LOGTAG, - "error generating key pair " + e.getMessage()); - } - } - return this.keyPair; - } - - @Override - public String getReplyForUnreadableMessage(SessionID arg0) { - // TODO Auto-generated method stub - return null; - } - - @Override - public OtrPolicy getSessionPolicy(SessionID arg0) { - return otrPolicy; - } - - @Override - public void injectMessage(SessionID session, String body) - throws OtrException { - MessagePacket packet = new MessagePacket(); - packet.setFrom(account.getJid()); - if (session.getUserID().isEmpty()) { - packet.setAttribute("to", session.getAccountID()); - } else { - packet.setAttribute("to", session.getAccountID() + "/" + session.getUserID()); - } - packet.setBody(body); - packet.addChild("private", "urn:xmpp:carbons:2"); - packet.addChild("no-copy", "urn:xmpp:hints"); - packet.addChild("no-permanent-store", "urn:xmpp:hints"); - packet.addChild("no-permanent-storage", "urn:xmpp:hints"); - try { - Jid jid = Jid.fromSessionID(session); - Conversation conversation = mXmppConnectionService.find(account,jid); - if (conversation != null && conversation.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) { - if (ConversationsPlusPreferences.chatStates()) { - packet.addChild(ChatState.toElement(conversation.getOutgoingChatState())); - } - } - } catch (final InvalidJidException ignored) { - - } - - packet.setType(MessagePacket.TYPE_CHAT); - account.getXmppConnection().sendMessagePacket(packet); - } - - @Override - public void messageFromAnotherInstanceReceived(SessionID session) { - sendOtrErrorMessage(session, "Message from another OTR-instance received"); - } - - @Override - public void multipleInstancesDetected(SessionID arg0) { - // TODO Auto-generated method stub - - } - - @Override - public void requireEncryptedMessage(SessionID arg0, String arg1) - throws OtrException { - // TODO Auto-generated method stub - - } - - @Override - public void showError(SessionID arg0, String arg1) throws OtrException { - Log.d(Config.LOGTAG,"show error"); - } - - @Override - public void smpAborted(SessionID id) throws OtrException { - setSmpStatus(id, Conversation.Smp.STATUS_NONE); - } - - private void setSmpStatus(SessionID id, int status) { - try { - final Jid jid = Jid.fromSessionID(id); - Conversation conversation = this.mXmppConnectionService.find(this.account,jid); - if (conversation!=null) { - conversation.smp().status = status; - mXmppConnectionService.updateConversationUi(); - } - } catch (final InvalidJidException ignored) { - - } - } - - @Override - public void smpError(SessionID id, int arg1, boolean arg2) - throws OtrException { - setSmpStatus(id, Conversation.Smp.STATUS_NONE); - } - - @Override - public void unencryptedMessageReceived(SessionID arg0, String arg1) - throws OtrException { - throw new OtrException(new Exception("unencrypted message received")); - } - - @Override - public void unreadableMessageReceived(SessionID session) throws OtrException { - Log.d(Config.LOGTAG,"unreadable message received"); - sendOtrErrorMessage(session, "You sent me an unreadable OTR-encrypted message"); - } - - public void sendOtrErrorMessage(SessionID session, String errorText) { - try { - Jid jid = Jid.fromSessionID(session); - Conversation conversation = mXmppConnectionService.find(account, jid); - String id = conversation == null ? null : conversation.getLastReceivedOtrMessageId(); - if (id != null) { - MessagePacket packet = mXmppConnectionService.getMessageGenerator() - .generateOtrError(jid, id, errorText); - packet.setFrom(account.getJid()); - mXmppConnectionService.sendMessagePacket(account,packet); - Log.d(Config.LOGTAG,packet.toString()); - Log.d(Config.LOGTAG,account.getJid().toBareJid().toString() - +": unreadable OTR message in "+conversation.getName()); - } - } catch (InvalidJidException e) { - return; - } - } - - @Override - public void unverify(SessionID id, String arg1) { - setSmpStatus(id, Conversation.Smp.STATUS_FAILED); - } - - @Override - public void verify(SessionID id, String fingerprint, boolean approved) { - Log.d(Config.LOGTAG,"OtrService.verify("+id.toString()+","+fingerprint+","+String.valueOf(approved)+")"); - try { - final Jid jid = Jid.fromSessionID(id); - Conversation conversation = this.mXmppConnectionService.find(this.account,jid); - if (conversation!=null) { - if (approved) { - conversation.getContact().addOtrFingerprint(fingerprint); - } - conversation.smp().hint = null; - conversation.smp().status = Conversation.Smp.STATUS_VERIFIED; - mXmppConnectionService.updateConversationUi(); - mXmppConnectionService.syncRosterToDisk(conversation.getAccount()); - } - } catch (final InvalidJidException ignored) { - } - } - - @Override - public FragmenterInstructions getFragmenterInstructions(SessionID sessionID) { - return null; - } - -} diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/PgpEngine.java b/src/main/java/de/thedevstack/conversationsplus/crypto/PgpEngine.java deleted file mode 100644 index 531aca32..00000000 --- a/src/main/java/de/thedevstack/conversationsplus/crypto/PgpEngine.java +++ /dev/null @@ -1,374 +0,0 @@ -package de.thedevstack.conversationsplus.crypto; - -import java.io.ByteArrayInputStream; -import java.io.ByteArrayOutputStream; -import java.io.FileInputStream; -import java.io.FileOutputStream; -import java.io.IOException; -import java.io.InputStream; -import java.io.OutputStream; -import java.net.URL; - -import org.openintents.openpgp.OpenPgpSignatureResult; -import org.openintents.openpgp.util.OpenPgpApi; -import org.openintents.openpgp.util.OpenPgpApi.IOpenPgpCallback; - -import de.thedevstack.conversationsplus.ConversationsPlusPreferences; -import de.tzur.conversations.Settings; -import de.thedevstack.conversationsplus.R; -import de.thedevstack.conversationsplus.entities.Account; -import de.thedevstack.conversationsplus.entities.Contact; -import de.thedevstack.conversationsplus.entities.Conversation; -import de.thedevstack.conversationsplus.entities.DownloadableFile; -import de.thedevstack.conversationsplus.entities.Message; -import de.thedevstack.conversationsplus.http.HttpConnectionManager; -import de.thedevstack.conversationsplus.services.XmppConnectionService; -import de.thedevstack.conversationsplus.ui.UiCallback; -import android.app.PendingIntent; -import android.content.Intent; -import android.net.Uri; - -public class PgpEngine { - private OpenPgpApi api; - private XmppConnectionService mXmppConnectionService; - - public PgpEngine(OpenPgpApi api, XmppConnectionService service) { - this.api = api; - this.mXmppConnectionService = service; - } - - public void decrypt(final Message message, - final UiCallback<Message> callback) { - Intent params = new Intent(); - params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY); - params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message - .getConversation().getAccount().getJid().toBareJid().toString()); - if (message.getType() == Message.TYPE_TEXT) { - InputStream is = new ByteArrayInputStream(message.getBody() - .getBytes()); - final OutputStream os = new ByteArrayOutputStream(); - api.executeApiAsync(params, is, os, new IOpenPgpCallback() { - - @Override - public void onReturn(Intent result) { - switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, - OpenPgpApi.RESULT_CODE_ERROR)) { - case OpenPgpApi.RESULT_CODE_SUCCESS: - try { - os.flush(); - if (message.getEncryption() == Message.ENCRYPTION_PGP) { - message.setBody(os.toString()); - message.setEncryption(Message.ENCRYPTION_DECRYPTED); - final HttpConnectionManager manager = mXmppConnectionService.getHttpConnectionManager(); - if (message.trusted() - && message.treatAsDownloadable() != Message.Decision.NEVER - && ConversationsPlusPreferences.autoDownloadFileLink() - && mXmppConnectionService.isDownloadAllowedInConnection() - && ConversationsPlusPreferences.autoAcceptFileSize() > 0) { - manager.createNewDownloadConnection(message); - } - callback.success(message); - } - } catch (IOException e) { - callback.error(R.string.openpgp_error, message); - return; - } - - return; - case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: - callback.userInputRequried((PendingIntent) result - .getParcelableExtra(OpenPgpApi.RESULT_INTENT), - message); - return; - case OpenPgpApi.RESULT_CODE_ERROR: - callback.error(R.string.openpgp_error, message); - } - } - }); - } else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) { - try { - final DownloadableFile inputFile = this.mXmppConnectionService - .getFileBackend().getFile(message, false); - final DownloadableFile outputFile = this.mXmppConnectionService - .getFileBackend().getFile(message, true); - outputFile.getParentFile().mkdirs(); - outputFile.createNewFile(); - InputStream is = new FileInputStream(inputFile); - OutputStream os = new FileOutputStream(outputFile); - api.executeApiAsync(params, is, os, new IOpenPgpCallback() { - - @Override - public void onReturn(Intent result) { - switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, - OpenPgpApi.RESULT_CODE_ERROR)) { - case OpenPgpApi.RESULT_CODE_SUCCESS: - URL url = message.getFileParams().url; - mXmppConnectionService.getFileBackend().updateFileParams(message,url); - message.setEncryption(Message.ENCRYPTION_DECRYPTED); - PgpEngine.this.mXmppConnectionService - .updateMessage(message); - inputFile.delete(); - Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE); - intent.setData(Uri.fromFile(outputFile)); - mXmppConnectionService.sendBroadcast(intent); - callback.success(message); - return; - case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: - callback.userInputRequried( - (PendingIntent) result - .getParcelableExtra(OpenPgpApi.RESULT_INTENT), - message); - return; - case OpenPgpApi.RESULT_CODE_ERROR: - callback.error(R.string.openpgp_error, message); - } - } - }); - } catch (final IOException e) { - callback.error(R.string.error_decrypting_file, message); - } - - } - } - - public void encrypt(final Message message, - final UiCallback<Message> callback) { - - Intent params = new Intent(); - params.setAction(OpenPgpApi.ACTION_ENCRYPT); - if (message.getConversation().getMode() == Conversation.MODE_SINGLE) { - long[] keys = { message.getConversation().getContact() - .getPgpKeyId() }; - params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, keys); - } else { - params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, message.getConversation() - .getMucOptions().getPgpKeyIds()); - } - params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message - .getConversation().getAccount().getJid().toBareJid().toString()); - - if (!message.needsUploading()) { - params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true); - String body; - if (message.hasFileOnRemoteHost()) { - body = message.getFileParams().url.toString(); - } else { - body = message.getBody(); - } - InputStream is = new ByteArrayInputStream(body.getBytes()); - final OutputStream os = new ByteArrayOutputStream(); - api.executeApiAsync(params, is, os, new IOpenPgpCallback() { - - @Override - public void onReturn(Intent result) { - switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, - OpenPgpApi.RESULT_CODE_ERROR)) { - case OpenPgpApi.RESULT_CODE_SUCCESS: - try { - os.flush(); - StringBuilder encryptedMessageBody = new StringBuilder(); - String[] lines = os.toString().split("\n"); - for (int i = 2; i < lines.length - 1; ++i) { - if (!lines[i].contains("Version")) { - encryptedMessageBody.append(lines[i]); - } - } - message.setEncryptedBody(encryptedMessageBody - .toString()); - callback.success(message); - } catch (IOException e) { - callback.error(R.string.openpgp_error, message); - } - - break; - case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: - callback.userInputRequried((PendingIntent) result - .getParcelableExtra(OpenPgpApi.RESULT_INTENT), - message); - break; - case OpenPgpApi.RESULT_CODE_ERROR: - callback.error(R.string.openpgp_error, message); - break; - } - } - }); - } else { - try { - DownloadableFile inputFile = this.mXmppConnectionService - .getFileBackend().getFile(message, true); - DownloadableFile outputFile = this.mXmppConnectionService - .getFileBackend().getFile(message, false); - outputFile.getParentFile().mkdirs(); - outputFile.createNewFile(); - InputStream is = new FileInputStream(inputFile); - OutputStream os = new FileOutputStream(outputFile); - api.executeApiAsync(params, is, os, new IOpenPgpCallback() { - - @Override - public void onReturn(Intent result) { - switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, - OpenPgpApi.RESULT_CODE_ERROR)) { - case OpenPgpApi.RESULT_CODE_SUCCESS: - callback.success(message); - break; - case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: - callback.userInputRequried( - (PendingIntent) result - .getParcelableExtra(OpenPgpApi.RESULT_INTENT), - message); - break; - case OpenPgpApi.RESULT_CODE_ERROR: - callback.error(R.string.openpgp_error, message); - break; - } - } - }); - } catch (final IOException e) { - callback.error(R.string.openpgp_error, message); - } - } - } - - public long fetchKeyId(Account account, String status, String signature) { - if ((signature == null) || (api == null)) { - return 0; - } - if (status == null) { - status = ""; - } - final StringBuilder pgpSig = new StringBuilder(); - pgpSig.append("-----BEGIN PGP SIGNED MESSAGE-----"); - pgpSig.append('\n'); - pgpSig.append('\n'); - pgpSig.append(status); - pgpSig.append('\n'); - pgpSig.append("-----BEGIN PGP SIGNATURE-----"); - pgpSig.append('\n'); - pgpSig.append('\n'); - pgpSig.append(signature.replace("\n", "")); - pgpSig.append('\n'); - pgpSig.append("-----END PGP SIGNATURE-----"); - Intent params = new Intent(); - params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY); - params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true); - params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid().toBareJid().toString()); - InputStream is = new ByteArrayInputStream(pgpSig.toString().getBytes()); - ByteArrayOutputStream os = new ByteArrayOutputStream(); - Intent result = api.executeApi(params, is, os); - switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, - OpenPgpApi.RESULT_CODE_ERROR)) { - case OpenPgpApi.RESULT_CODE_SUCCESS: - OpenPgpSignatureResult sigResult = result - .getParcelableExtra(OpenPgpApi.RESULT_SIGNATURE); - if (sigResult != null) { - return sigResult.getKeyId(); - } else { - return 0; - } - case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: - return 0; - case OpenPgpApi.RESULT_CODE_ERROR: - return 0; - } - return 0; - } - - public void generateSignature(final Account account, String status, - final UiCallback<Account> callback) { - Intent params = new Intent(); - params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true); - params.setAction(OpenPgpApi.ACTION_SIGN); - params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid().toBareJid().toString()); - InputStream is = new ByteArrayInputStream(status.getBytes()); - final OutputStream os = new ByteArrayOutputStream(); - api.executeApiAsync(params, is, os, new IOpenPgpCallback() { - - @Override - public void onReturn(Intent result) { - switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) { - case OpenPgpApi.RESULT_CODE_SUCCESS: - StringBuilder signatureBuilder = new StringBuilder(); - try { - os.flush(); - String[] lines = os.toString().split("\n"); - boolean sig = false; - for (String line : lines) { - if (sig) { - if (line.contains("END PGP SIGNATURE")) { - sig = false; - } else { - if (!line.contains("Version")) { - signatureBuilder.append(line); - } - } - } - if (line.contains("BEGIN PGP SIGNATURE")) { - sig = true; - } - } - } catch (IOException e) { - callback.error(R.string.openpgp_error, account); - return; - } - account.setKey("pgp_signature", signatureBuilder.toString()); - callback.success(account); - return; - case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: - callback.userInputRequried((PendingIntent) result - .getParcelableExtra(OpenPgpApi.RESULT_INTENT), - account); - return; - case OpenPgpApi.RESULT_CODE_ERROR: - callback.error(R.string.openpgp_error, account); - } - } - }); - } - - public void hasKey(final Contact contact, final UiCallback<Contact> callback) { - Intent params = new Intent(); - params.setAction(OpenPgpApi.ACTION_GET_KEY); - params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId()); - params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, contact.getAccount() - .getJid().toBareJid().toString()); - api.executeApiAsync(params, null, null, new IOpenPgpCallback() { - - @Override - public void onReturn(Intent result) { - switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) { - case OpenPgpApi.RESULT_CODE_SUCCESS: - callback.success(contact); - return; - case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: - callback.userInputRequried((PendingIntent) result - .getParcelableExtra(OpenPgpApi.RESULT_INTENT), - contact); - return; - case OpenPgpApi.RESULT_CODE_ERROR: - callback.error(R.string.openpgp_error, contact); - } - } - }); - } - - public PendingIntent getIntentForKey(Contact contact) { - Intent params = new Intent(); - params.setAction(OpenPgpApi.ACTION_GET_KEY); - params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId()); - params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, contact.getAccount() - .getJid().toBareJid().toString()); - Intent result = api.executeApi(params, null, null); - return (PendingIntent) result - .getParcelableExtra(OpenPgpApi.RESULT_INTENT); - } - - public PendingIntent getIntentForKey(Account account, long pgpKeyId) { - Intent params = new Intent(); - params.setAction(OpenPgpApi.ACTION_GET_KEY); - params.putExtra(OpenPgpApi.EXTRA_KEY_ID, pgpKeyId); - params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid().toBareJid().toString()); - Intent result = api.executeApi(params, null, null); - return (PendingIntent) result - .getParcelableExtra(OpenPgpApi.RESULT_INTENT); - } -} diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/DigestMd5.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/DigestMd5.java deleted file mode 100644 index f4c3f28e..00000000 --- a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/DigestMd5.java +++ /dev/null @@ -1,91 +0,0 @@ -package de.thedevstack.conversationsplus.crypto.sasl; - -import android.util.Base64; - -import java.math.BigInteger; -import java.nio.charset.Charset; -import java.security.MessageDigest; -import java.security.NoSuchAlgorithmException; -import java.security.SecureRandom; - -import de.thedevstack.conversationsplus.entities.Account; -import de.thedevstack.conversationsplus.utils.CryptoHelper; -import de.thedevstack.conversationsplus.xml.TagWriter; - -public class DigestMd5 extends SaslMechanism { - public DigestMd5(final TagWriter tagWriter, final Account account, final SecureRandom rng) { - super(tagWriter, account, rng); - } - - @Override - public int getPriority() { - return 10; - } - - @Override - public String getMechanism() { - return "DIGEST-MD5"; - } - - private State state = State.INITIAL; - - @Override - public String getResponse(final String challenge) throws AuthenticationException { - switch (state) { - case INITIAL: - state = State.RESPONSE_SENT; - final String encodedResponse; - try { - final Tokenizer tokenizer = new Tokenizer(Base64.decode(challenge, Base64.DEFAULT)); - String nonce = ""; - for (final String token : tokenizer) { - final String[] parts = token.split("=", 2); - if (parts[0].equals("nonce")) { - nonce = parts[1].replace("\"", ""); - } else if (parts[0].equals("rspauth")) { - return ""; - } - } - final String digestUri = "xmpp/" + account.getServer(); - final String nonceCount = "00000001"; - final String x = account.getUsername() + ":" + account.getServer() + ":" - + account.getPassword(); - final MessageDigest md = MessageDigest.getInstance("MD5"); - final byte[] y = md.digest(x.getBytes(Charset.defaultCharset())); - final String cNonce = new BigInteger(100, rng).toString(32); - final byte[] a1 = CryptoHelper.concatenateByteArrays(y, - (":" + nonce + ":" + cNonce).getBytes(Charset.defaultCharset())); - final String a2 = "AUTHENTICATE:" + digestUri; - final String ha1 = CryptoHelper.bytesToHex(md.digest(a1)); - final String ha2 = CryptoHelper.bytesToHex(md.digest(a2.getBytes(Charset - .defaultCharset()))); - final String kd = ha1 + ":" + nonce + ":" + nonceCount + ":" + cNonce - + ":auth:" + ha2; - final String response = CryptoHelper.bytesToHex(md.digest(kd.getBytes(Charset - .defaultCharset()))); - final String saslString = "username=\"" + account.getUsername() - + "\",realm=\"" + account.getServer() + "\",nonce=\"" - + nonce + "\",cnonce=\"" + cNonce + "\",nc=" + nonceCount - + ",qop=auth,digest-uri=\"" + digestUri + "\",response=" - + response + ",charset=utf-8"; - encodedResponse = Base64.encodeToString( - saslString.getBytes(Charset.defaultCharset()), - Base64.NO_WRAP); - } catch (final NoSuchAlgorithmException e) { - throw new AuthenticationException(e); - } - - return encodedResponse; - case RESPONSE_SENT: - state = State.VALID_SERVER_RESPONSE; - break; - case VALID_SERVER_RESPONSE: - if (challenge==null) { - return null; //everything is fine - } - default: - throw new InvalidStateException(state); - } - return null; - } -} diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/Plain.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/Plain.java deleted file mode 100644 index 179c12de..00000000 --- a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/Plain.java +++ /dev/null @@ -1,30 +0,0 @@ -package de.thedevstack.conversationsplus.crypto.sasl; - -import android.util.Base64; - -import java.nio.charset.Charset; - -import de.thedevstack.conversationsplus.entities.Account; -import de.thedevstack.conversationsplus.xml.TagWriter; - -public class Plain extends SaslMechanism { - public Plain(final TagWriter tagWriter, final Account account) { - super(tagWriter, account, null); - } - - @Override - public int getPriority() { - return 10; - } - - @Override - public String getMechanism() { - return "PLAIN"; - } - - @Override - public String getClientFirstMessage() { - final String sasl = '\u0000' + account.getUsername() + '\u0000' + account.getPassword(); - return Base64.encodeToString(sasl.getBytes(Charset.defaultCharset()), Base64.NO_WRAP); - } -} diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/SaslMechanism.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/SaslMechanism.java deleted file mode 100644 index ed2764c8..00000000 --- a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/SaslMechanism.java +++ /dev/null @@ -1,62 +0,0 @@ -package de.thedevstack.conversationsplus.crypto.sasl; - -import java.security.SecureRandom; - -import de.thedevstack.conversationsplus.entities.Account; -import de.thedevstack.conversationsplus.xml.TagWriter; - -public abstract class SaslMechanism { - - final protected TagWriter tagWriter; - final protected Account account; - final protected SecureRandom rng; - - protected static enum State { - INITIAL, - AUTH_TEXT_SENT, - RESPONSE_SENT, - VALID_SERVER_RESPONSE, - } - - public static class AuthenticationException extends Exception { - public AuthenticationException(final String message) { - super(message); - } - - public AuthenticationException(final Exception inner) { - super(inner); - } - } - - public static class InvalidStateException extends AuthenticationException { - public InvalidStateException(final String message) { - super(message); - } - - public InvalidStateException(final State state) { - this("Invalid state: " + state.toString()); - } - } - - public SaslMechanism(final TagWriter tagWriter, final Account account, final SecureRandom rng) { - this.tagWriter = tagWriter; - this.account = account; - this.rng = rng; - } - - /** - * The priority is used to pin the authentication mechanism. If authentication fails, it MAY be retried with another - * mechanism of the same priority, but MUST NOT be tried with a mechanism of lower priority (to prevent downgrade - * attacks). - * @return An arbitrary int representing the priority - */ - public abstract int getPriority(); - - public abstract String getMechanism(); - public String getClientFirstMessage() { - return ""; - } - public String getResponse(final String challenge) throws AuthenticationException { - return ""; - } -} diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/ScramSha1.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/ScramSha1.java deleted file mode 100644 index a991b1d7..00000000 --- a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/ScramSha1.java +++ /dev/null @@ -1,232 +0,0 @@ -package de.thedevstack.conversationsplus.crypto.sasl; - -import android.util.Base64; -import android.util.LruCache; - -import org.bouncycastle.crypto.Digest; -import org.bouncycastle.crypto.digests.SHA1Digest; -import org.bouncycastle.crypto.macs.HMac; -import org.bouncycastle.crypto.params.KeyParameter; - -import java.math.BigInteger; -import java.nio.charset.Charset; -import java.security.InvalidKeyException; -import java.security.SecureRandom; - -import de.thedevstack.conversationsplus.entities.Account; -import de.thedevstack.conversationsplus.utils.CryptoHelper; -import de.thedevstack.conversationsplus.xml.TagWriter; - -public class ScramSha1 extends SaslMechanism { - // TODO: When channel binding (SCRAM-SHA1-PLUS) is supported in future, generalize this to indicate support and/or usage. - final private static String GS2_HEADER = "n,,"; - private String clientFirstMessageBare; - private byte[] serverFirstMessage; - final private String clientNonce; - private byte[] serverSignature = null; - private static HMac HMAC; - private static Digest DIGEST; - private static final byte[] CLIENT_KEY_BYTES = "Client Key".getBytes(); - private static final byte[] SERVER_KEY_BYTES = "Server Key".getBytes(); - - public static class KeyPair { - final public byte[] clientKey; - final public byte[] serverKey; - - public KeyPair(final byte[] clientKey, final byte[] serverKey) { - this.clientKey = clientKey; - this.serverKey = serverKey; - } - } - - private static final LruCache<String, KeyPair> CACHE; - - static { - DIGEST = new SHA1Digest(); - HMAC = new HMac(new SHA1Digest()); - CACHE = new LruCache<String, KeyPair>(10) { - protected KeyPair create(final String k) { - // Map keys are "bytesToHex(JID),bytesToHex(password),bytesToHex(salt),iterations". - // Changing any of these values forces a cache miss. `CryptoHelper.bytesToHex()' - // is applied to prevent commas in the strings breaking things. - final String[] kparts = k.split(",", 4); - try { - final byte[] saltedPassword, serverKey, clientKey; - saltedPassword = hi(CryptoHelper.hexToString(kparts[1]).getBytes(), - Base64.decode(CryptoHelper.hexToString(kparts[2]), Base64.DEFAULT), Integer.valueOf(kparts[3])); - serverKey = hmac(saltedPassword, SERVER_KEY_BYTES); - clientKey = hmac(saltedPassword, CLIENT_KEY_BYTES); - - return new KeyPair(clientKey, serverKey); - } catch (final InvalidKeyException | NumberFormatException e) { - return null; - } - } - }; - } - - private State state = State.INITIAL; - - public ScramSha1(final TagWriter tagWriter, final Account account, final SecureRandom rng) { - super(tagWriter, account, rng); - - // This nonce should be different for each authentication attempt. - clientNonce = new BigInteger(100, this.rng).toString(32); - clientFirstMessageBare = ""; - } - - @Override - public int getPriority() { - return 20; - } - - @Override - public String getMechanism() { - return "SCRAM-SHA-1"; - } - - @Override - public String getClientFirstMessage() { - if (clientFirstMessageBare.isEmpty() && state == State.INITIAL) { - clientFirstMessageBare = "n=" + CryptoHelper.saslEscape(CryptoHelper.saslPrep(account.getUsername())) + - ",r=" + this.clientNonce; - state = State.AUTH_TEXT_SENT; - } - return Base64.encodeToString( - (GS2_HEADER + clientFirstMessageBare).getBytes(Charset.defaultCharset()), - Base64.NO_WRAP); - } - - @Override - public String getResponse(final String challenge) throws AuthenticationException { - switch (state) { - case AUTH_TEXT_SENT: - serverFirstMessage = Base64.decode(challenge, Base64.DEFAULT); - final Tokenizer tokenizer = new Tokenizer(serverFirstMessage); - String nonce = ""; - int iterationCount = -1; - String salt = ""; - for (final String token : tokenizer) { - if (token.charAt(1) == '=') { - switch (token.charAt(0)) { - case 'i': - try { - iterationCount = Integer.parseInt(token.substring(2)); - } catch (final NumberFormatException e) { - throw new AuthenticationException(e); - } - break; - case 's': - salt = token.substring(2); - break; - case 'r': - nonce = token.substring(2); - break; - case 'm': - /* - * RFC 5802: - * m: This attribute is reserved for future extensibility. In this - * version of SCRAM, its presence in a client or a server message - * MUST cause authentication failure when the attribute is parsed by - * the other end. - */ - throw new AuthenticationException("Server sent reserved token: `m'"); - } - } - } - - if (iterationCount < 0) { - throw new AuthenticationException("Server did not send iteration count"); - } - if (nonce.isEmpty() || !nonce.startsWith(clientNonce)) { - throw new AuthenticationException("Server nonce does not contain client nonce: " + nonce); - } - if (salt.isEmpty()) { - throw new AuthenticationException("Server sent empty salt"); - } - - final String clientFinalMessageWithoutProof = "c=" + Base64.encodeToString( - GS2_HEADER.getBytes(), Base64.NO_WRAP) + ",r=" + nonce; - final byte[] authMessage = (clientFirstMessageBare + ',' + new String(serverFirstMessage) + ',' - + clientFinalMessageWithoutProof).getBytes(); - - // Map keys are "bytesToHex(JID),bytesToHex(password),bytesToHex(salt),iterations". - final KeyPair keys = CACHE.get( - CryptoHelper.bytesToHex(account.getJid().toBareJid().toString().getBytes()) + "," - + CryptoHelper.bytesToHex(account.getPassword().getBytes()) + "," - + CryptoHelper.bytesToHex(salt.getBytes()) + "," - + String.valueOf(iterationCount) - ); - if (keys == null) { - throw new AuthenticationException("Invalid keys generated"); - } - final byte[] clientSignature; - try { - serverSignature = hmac(keys.serverKey, authMessage); - final byte[] storedKey = digest(keys.clientKey); - - clientSignature = hmac(storedKey, authMessage); - - } catch (final InvalidKeyException e) { - throw new AuthenticationException(e); - } - - final byte[] clientProof = new byte[keys.clientKey.length]; - - for (int i = 0; i < clientProof.length; i++) { - clientProof[i] = (byte) (keys.clientKey[i] ^ clientSignature[i]); - } - - - final String clientFinalMessage = clientFinalMessageWithoutProof + ",p=" + - Base64.encodeToString(clientProof, Base64.NO_WRAP); - state = State.RESPONSE_SENT; - return Base64.encodeToString(clientFinalMessage.getBytes(), Base64.NO_WRAP); - case RESPONSE_SENT: - final String clientCalculatedServerFinalMessage = "v=" + - Base64.encodeToString(serverSignature, Base64.NO_WRAP); - if (challenge == null || !clientCalculatedServerFinalMessage.equals(new String(Base64.decode(challenge, Base64.DEFAULT)))) { - throw new AuthenticationException("Server final message does not match calculated final message"); - } - state = State.VALID_SERVER_RESPONSE; - return ""; - default: - throw new InvalidStateException(state); - } - } - - public static synchronized byte[] hmac(final byte[] key, final byte[] input) - throws InvalidKeyException { - HMAC.init(new KeyParameter(key)); - HMAC.update(input, 0, input.length); - final byte[] out = new byte[HMAC.getMacSize()]; - HMAC.doFinal(out, 0); - return out; - } - - public static synchronized byte[] digest(byte[] bytes) { - DIGEST.reset(); - DIGEST.update(bytes, 0, bytes.length); - final byte[] out = new byte[DIGEST.getDigestSize()]; - DIGEST.doFinal(out, 0); - return out; - } - - /* - * Hi() is, essentially, PBKDF2 [RFC2898] with HMAC() as the - * pseudorandom function (PRF) and with dkLen == output length of - * HMAC() == output length of H(). - */ - private static synchronized byte[] hi(final byte[] key, final byte[] salt, final int iterations) - throws InvalidKeyException { - byte[] u = hmac(key, CryptoHelper.concatenateByteArrays(salt, CryptoHelper.ONE)); - byte[] out = u.clone(); - for (int i = 1; i < iterations; i++) { - u = hmac(key, u); - for (int j = 0; j < u.length; j++) { - out[j] ^= u[j]; - } - } - return out; - } -} diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/Tokenizer.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/Tokenizer.java deleted file mode 100644 index cc2805de..00000000 --- a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/Tokenizer.java +++ /dev/null @@ -1,78 +0,0 @@ -package de.thedevstack.conversationsplus.crypto.sasl; - -import java.util.ArrayList; -import java.util.Arrays; -import java.util.Iterator; -import java.util.List; -import java.util.NoSuchElementException; - -/** - * A tokenizer for GS2 header strings - */ -public final class Tokenizer implements Iterator<String>, Iterable<String> { - private final List<String> parts; - private int index; - - public Tokenizer(final byte[] challenge) { - final String challengeString = new String(challenge); - parts = new ArrayList<>(Arrays.asList(challengeString.split(","))); - // Trim parts. - for (int i = 0; i < parts.size(); i++) { - parts.set(i, parts.get(i).trim()); - } - index = 0; - } - - /** - * Returns true if there is at least one more element, false otherwise. - * - * @see #next - */ - @Override - public boolean hasNext() { - return parts.size() != index + 1; - } - - /** - * Returns the next object and advances the iterator. - * - * @return the next object. - * @throws java.util.NoSuchElementException if there are no more elements. - * @see #hasNext - */ - @Override - public String next() { - if (hasNext()) { - return parts.get(index++); - } else { - throw new NoSuchElementException("No such element. Size is: " + parts.size()); - } - } - - /** - * Removes the last object returned by {@code next} from the collection. - * This method can only be called once between each call to {@code next}. - * - * @throws UnsupportedOperationException if removing is not supported by the collection being - * iterated. - * @throws IllegalStateException if {@code next} has not been called, or {@code remove} has - * already been called after the last call to {@code next}. - */ - @Override - public void remove() { - if(index <= 0) { - throw new IllegalStateException("You can't delete an element before first next() method call"); - } - parts.remove(--index); - } - - /** - * Returns an {@link java.util.Iterator} for the elements in this object. - * - * @return An {@code Iterator} instance. - */ - @Override - public Iterator<String> iterator() { - return parts.iterator(); - } -} |